名词
中文翻译：Unknown
同义词：
['sounder', 'sonar', 'sonic', 'sonde', 'sonograph']
例句：
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1. The sonar system detected a submarine in the ocean.
声纳系统在海洋中探测到了一艘潜艇。
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2. The sonar was used to map the underwater terrain.
声纳被用来绘制海底地形图。
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3. The sonar operator carefully monitored the depth and distance of the target.
声纳操作员仔细监测目标的深度和距离。